Malicious PDF — malware analysis report

Static analysis result for SHA-256 2029e2bb96ead4e9…

MALICIOUS

PDF

96.2 KB Created: 2021-09-07 18:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1aa5dc759510aaf7a8349c8509edf232 SHA-1: 4d163220bd40a5332172263c39531c910c34aae1 SHA-256: 2029e2bb96ead4e9cdd9af13349457a04f9c560ecedd5aa2e4bc56871f0e6761
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, with many URLs pointing to compromised CMS uploads, and it contains language indicative of an invoice or payment lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to trick users into visiting malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16088336885cc6---fukedikoxi.pdf In PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ac5f4de4529eed431485b661b772d9e5/jurud.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/15653725786.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/tobuzeru.pdfIn PDF document text
    • http://sparkpro.lv/content/file/wevugaxoxevabefe.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijikasenim.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/jorolax.pdfIn PDF document text
    • https://dintek.eu/uploads/file/9943218223.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/47fc4ff0d5a167ded5c4272fa946a936/javevajizajisaseguso.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a411bdeabc6---ritikikopopepuxirunulifi.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c4de8363d---kekazomuluko.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/26213515393.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/d3c2f48622613f576ca50aba19eba07a/35067888554.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/aae626b21aa4479789fc1b8f34cb2a8d/35539581038.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411e118703---69941725780.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/87b78af68f89df709d6ae378116ba3d8/56012847443.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/suvabibijebu.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/72207907139.pdfIn PDF document text
    • http://upakuika.com/img/file/susuvivopum.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/42309794527.pdfIn PDF document text
    • http://fuli-capital.com/userfiles/file/15847575327.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/pozelolizeraluwo.pdfIn PDF document text
    • http://parfumland.sk/upl/jaxolawepux.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xidijax.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/xupawedebezonitat.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/novawopivirokuruxizufopi.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/lebovfj7k4rn05h3f78pffjsj6/begesinivireza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=uml+class+diagram+quick+reference+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D20 11088 bytes
SHA-256: 252986dcf134b078406d5bf47c76bdc79d980a5d8e9a7d46ddacaee02b37cd8a
font_01_sfnt_off00012666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 19604 bytes
SHA-256: e7fcd3ca6ff8b8dfe4e6f0ad956926ebb8686dfb138adb505972d45709af461f
font_02_sfnt_off00015a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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